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(No Model.)

J. H. KOLB. A METHOD OF AND APPARATUS FOR CONGENTRATING METALLIC ANDOTHER SALTS.

No. 308,903. I Patented Dec. 9, I884.

WITNESSES W222? M mmm NITED STATES PATENT OFFICE.

JOHN H. KOLB, or BRooKLYN, AssIeNoR or ONE-THIRD TO WILLIAM J.

. MATHEsoN, on NEW YORK, N. Y.

METHOD OF AND APPARATUS FOR CONCENTRATING METALLIC AND OTHER SALTS.-

SPECIPICA'I'ION forming part of Letters Patent No. 308,903, datedDecember 9, 1884.

Application filed July 25, 1884. (No model.)

To all whom it may concern Be it known that I, JOHN H. KOLB, a citizenof the United States, residing in the city of Brooklyn, county of Kings,and State of New York, have inventeda new and useful Method of andApparatus for Concentrating Metallic and other Salts, ofwhich thefollowing is afull, clear, and accurate description.

In the way that such salts are now usually concentrated they areextremely liable to be come destroyed by reason of the high heatnecessarily used and by the manner in which the heat is applied. Thesalts in solution are usually placed in a vessel and heat applied to thebottom thereof, the consequence of which is that, the heat actingunequally on the bottom of the vessel, the bottom portion of thesolution first becomes concentrated, and, resting on the bottom, isspoiled 'by the heat before the top or middle portion of the solution isproperly acted upon.

My invention hasfor its object an equal and uniform distribution of theheatto the solution containing the salts, in order to concentrate allportions of the solution at the same time.

My method consists in applying to the pan or concentrator holding thesaline solution to be concentrated means whereby heat is ap pliedequally to the top surface of the solution and of said pan 5 and theapparatus to be used for this purpose consists of a pan or concentratorhaving an outside water-jacket or other protection through which watercan circulate, and which outside covering or waterjacket can be attachedat will to a water-supply of sufficient pressure to cause the water tocirculate therein, the whole movable, and to be used in connection witha reverberatory or other suitable furnace.

In applying my invention I take a pan of suitable dimensions to containthe amount of solution to be concentrated and aifix to the outer sidesthereof a protection or jacket pro vided with means whereby water. canbe introduced into and discharged therefrom at will. The pan is thenmounted upon a truck, and when filled with the solution to beconcentrated is pushed into a reverberatory or other furnace. Theconnections are then made between the source of water supply and the jacket and discharge-pipe, and the water allowed to circulate through thejacket. The flame of the furnace is thrown onto the top surface of thesolution, and the sides of the containingpan are kept from being warpedand injured 5 by the heat, and the solution is evenly concentratedwithout danger of any portions thereof caking or burning on the sides orbottom of the pan.

In the drawings, Figure 1 shows my concen- 6o trator and the form ofconnection with the solution to be concentrated which I prefer. Fig. 2shows the connection of the water-supply with the water-jacket. Fig. 3shows a sectional view of the pan and water-jacket.

A represents a reservoir placed at a convenient distance above thepan,and filled with the liquid or solution to be concentrated.

B is a pipe leading from the reservoir down to the containing-pan. Thispipe B is provided with the stop-cock b, by which the solution can beturned on so as to flow down when desired, or the supply turned off whendesired.

0 is the containing-pan or other receptacle, of suitable dimensions,mounted 011 a truck, D, the wheels of which run on a truck or slide.

E is the reverberatory furnace. The pan 0 is surrounded by awater-jacket,- H, through which a constant supply of water circulates.The water-jacket H is provided with a dis- 8-0 charge, h. The water issupplied from a reservoir, G, (see Fig. 2,) which is connected with asource of water-supply by the water-pipe I.

Attached to the lower end of the reservoir G is the pipe 0, connectedwith which is the 8 5 flexible hose or pipe P, the end of which isplaced in the water-jacket H.

The reservoir G and pipe I are provided with a ball-cock, R, whichfioats in the water of the reservoir, and by its action automat- 9oically regulates the supply of water passing through the pipe 0 andflexible connection P to water-jacket H, and keeps the water-supply at aconstant pressure.

The operation of my inyention is as follows: The pan 0 and water-jacketH, mounted on the truck D, are moved into the furnace E on the track orslide in the furnace to a suitable posi tion under the pipe B,connecting with the reservoir A, containing the solution to be con- IOOcentrated. The water-jacket is connected by means of the flexible hoseor connection P and pipe O with the water-reservoir G. The stopcock I)is then turned and a sufficient supply 5 of solution let into the pan.\Vhen sufficient quantity of solution to be concentrated has entered thepan 0, the stop-cock b is turned and the supply of solution cut off. Asthe solution is concentrated, the water-jacket H, being constantly fedwith a supply of water, pre Vents the sides of the containing-pan C frombeing impaired by the flame of the furnace, and the solution is evenlyconcentrated, and no portion of the solution is caked or burned. I 5\Vhen the salts a resufficiently concentrated,

the jacket is disconnected from the waterpipes, the truck removed fromthe furnace, and the pan is emptied.

Having thus described my invention, what I claim, and desire to secureby Letters Patent,

1. An apparatus for concentrating metallic salts or other substances,consisting of a pan or concentrator holding the solution to beconcentrated, an outside waterjacket or other protection through whichwater can circulate, and which outside jacket or covering can beattached at will to a water-supply of sufficient pressure to cause thewater to circulate therein, the pan and water-jacket being movable andused in connection with a reverberatory or other suitable furnace.

2. An apparatus for concentrating metallic salts or other substances,consisting of a pan orconcentrator connected by a pipe or other suitableconnection with a reservoir holding the solution to be concentrated, awater-j acket or other protection surrounding said pan, through whichwater can circulate, which water-jacket or other protection can beattached at will to a water-supply of sufficient pressure to cause thewater to circulate therein, the pan or concentrator and water-jacket orother protection being mounted on a suitable truck running on a track orslide, the top surface of the solution in said pan beingsubjected to theheat of a reverberatory or other suitable furnace.

3. An apparatus for concentrating metallic salts or other substances,consisting of a pan or concentrator connected by a pipe or othersuitable connection with a reservoir holding the solution to beconcentrated, a watenjacket or other protection surrounding said pan,through which water can circulate, which water-jacket or otherprotection can be attached at will by pipes or other suitableconnections with a reservoir holding water, the supply of which water tosaid water-j acket is automatically regulated and kept at a constantpressure, such pan or concentrator and waterjacket or other protectionbeing mounted on a suitable truck moving 011 a track or slide, the topsurface of the solution in said pan being subjected to the heat of areverberatory or other furnace.

In testimony whereof I have hereunto set my hand this 15th day of July,1884.

JOHN H. KOLB. In presence of- \VILLIA ARCHER, NV. XVALLAOE URQUHART, Jr.

